完成基于管道過濾器風格的KWIC實現(xiàn)

1、精選優(yōu)質文檔-傾情為你奉上實驗2：軟件體系結構風格實現(xiàn)一、實驗目的1）初步了解不同的體系結構風格2）掌握不同體系結構風格的實現(xiàn)二、實驗學時 4學時。三、實驗方法根據(jù)KWIC的描述，用所熟悉的語言，完成實驗內容。四、實驗環(huán)境Windows7旗艦版 jdk1.6 Eclipse3.7.0五、實驗內容2）完成基于管道過濾器風格的KWIC實現(xiàn)六、實驗操作步驟1. KWIC描述：KWIC索引系統(tǒng)接受一些行，每行有若干字，每個字由若干字符組成；每行都可以循環(huán)移位。重復地把第一個字刪除，然后接到行末； KWIC把所有行的各種移位情況按照字母表順序輸出。完成基于管道過濾器風格的KWIC實現(xiàn)Main類packa

2、ge kwic_pipe;import java.io.File;import java.util.Scanner;public class Main public static void main(String args) File infile = new File("e:mykwic_in.txt"); File outfile = new File("e:mykwic_out.txt"); Scanner inputfile; Scanner outputfile; try inputfile = new Scanner(infile); out

3、putfile = new Scanner(outfile); / 定義三個管道 Pipe pipe1 = new Pipe(); Pipe pipe2 = new Pipe(); Pipe pipe3 = new Pipe(); / 定義四種過濾器 Input input = new Input(infile, pipe1); Shift shift = new Shift(pipe1, pipe2); Output output = new Output(pipe3, outfile); / 啟動四種過濾器的線程 input.transform() shift. transform ();

4、 output. transform (); / 直接輸出結果 System.out.println("- infile -"); String str = null; while (inputfile.hasNextLine() str = inputfile.nextLine(); System.out.println(str); System.out.println("input end"); Thread.sleep(3000); System.out.println("- outfile -"); while (output

5、file.hasNextLine() System.out.println(str); inputfile.close(); outputfile.close(); catch (Exception e) e.getMessage(); Filter類package kwic_pipe;import java.io.IOException;public abstract class Filter /定義輸入管道 protected Pipe input; /定義輸出管道 protected Pipe output; private boolean isStart = false; Filter

6、(Pipe input, Pipe output) this.input = input; this.output = output; / 防止多次調用，調用之后線程開始執(zhí)行 public void start() if(!isStart) isStart = true; Thread thread = new Thread(); thread.start(); /線程的 run 方法 public void run() try this.transform(); catch (IOException e) e.getMessage(); /將輸入數(shù)據(jù)轉換為所需數(shù)據(jù)并寫入輸出管道 /由子類實現(xiàn)

7、抽象方法 protected abstract void transform()throws IOException;Pipe類package kwic_pipe;import java.io.IOException;import java.io.PipedReader;import java.io.PipedWriter;import java.io.PrintWriter;import java.util.Scanner;public class Pipe /輸入管道 private Scanner pipereader; /輸出管道 private PrintWriter pipewri

8、ter; public Pipe()PipedWriter pw = new PipedWriter();PipedReader pr = new PipedReader();trypw.connect(pr); catch (IOException e)e.getMessage();pipewriter = new PrintWriter(pw);pipereader = new Scanner(pr); /讀入一行數(shù)據(jù)到管道 /return 讀入的數(shù)據(jù) public String readerLine() throws IOException return pipereader.nextL

9、ine(); /從管道輸出一行數(shù)據(jù) public void writerLine(String strline) throws IOException pipewriter.println(strline); /將讀管道關閉，調用該方法后，不能再從管道中讀數(shù)據(jù) /如不能關閉則拋出異 public void closeReader() throws IOException pipereader.close(); /先刷新數(shù)據(jù)，在將寫管道關閉，調用該方法后，不能向管道中寫數(shù)據(jù) /如不能關閉則拋出異常 public void closeWriter() throws IOException pipe

10、writer.flush(); pipewriter.close(); Alphabetizer類 package kwic_pipe;import java.io.IOException;import java.util.ArrayList;import java.util.Collections;public class Alphabetizer extends Filter private ArrayList<String> al = new ArrayList<String>(); Alphabetizer(Pipe input, Pipe output) su

11、per(input, output); /對讀入的數(shù)據(jù)進行排序 protected void transform() throws IOException String templine = null; /讀入數(shù)據(jù) while(templine = input.readerLine() != null) al.add(templine); /按字母表排序 Collections.sort(al); /對排序后的數(shù)據(jù)進行輸出 for(int i = 0; i < al.size(); i+) output.writerLine(al.get(i); input.closeReader();

12、 output.closeWriter(); Shift類package kwic_pipe;import java.io.IOException;import java.util.ArrayList;public class Shift extends Filter /單詞的列表 private ArrayList<String> wordlist = new ArrayList<String>(); /重組后的行的列表 private ArrayList<String> linelist = new ArrayList<String>();

13、Shift(Pipe input, Pipe output) super(input, output); Override protected void transform() throws IOException String templine = "" /讀數(shù)據(jù) while(templine = input.readerLine() != null) /將數(shù)據(jù)拆分為不同單詞 this.lineSplitWord(templine); /將單詞重組為句子 this.recombination(); /輸出重組結果 for(int i = 0; i < linelis

14、t.size(); i+) output.writerLine(linelist.get(i); /清空wordlist、linelist和templine wordlist.clear(); linelist.clear(); templine = "" input.closeReader(); output.closeWriter(); /從一行中提取單詞存入單詞表中 private void lineSplitWord(String line) String word = "" int i = 0; while(i < line.length

15、() if(line.charAt(i) != ' ') word += line.charAt(i); else wordlist.add(word); i+; private void recombination() for(int j = 0; j < wordlist.size(); j+) String templine = "" for (int k = wordlist.size() - 1 - j; k < wordlist.size(); k+) templine += wordlist.get(k) + " &quo

16、t; for (int m = 0; m < wordlist.size() - 1 - j; m+) if(m != wordlist.size() - j - 2) templine += wordlist.get(m) + " " else templine += wordlist.get(m); linelist.add(templine); Input類package kwic_pipe;import java.io.File;import java.io.IOException;import java.util.Scanner;public class I

17、nput extends Filter /輸入文件的文件名 private File infile; Input(File file, Pipe output) super(null, output); this.infile = file; Override /讀取數(shù)據(jù) protected void transform() throws IOException Scanner sc = new Scanner(infile); String templine = "" while(templine = sc.nextLine() != null) output.writerLine(templine); output.closeWriter(); sc.close(); Output類package kwic_pipe;import java.io.File;import java.io.IOException;import java.io.PrintWriter;public class Output extends Filter /輸出文件的文件名 private File file; Output(Pipe input, File file) super(input, null); this.file = file